//
//  GJIPUtil.m
//  xmgjAppFront
//
//  Created by ZekiMini on 2021/2/3.
//  Copyright © 2021 guojutech. All rights reserved.
//


#define IOS_CELLULAR    @"pdp_ip0"

#define IOS_WIFI        @"en0"

#define IOS_VPN         @"utun0"

#define IP_ADDR_IPv4    @"ipv4"

#define IP_ADDR_IPv6    @"ipv6"

#import <ifaddrs.h>

#import <arpa/inet.h>

#import <net/if.h>


#import "GJIPUtil.h"

@implementation GJIPUtil



 

// 判断当前网络是否是ipv6

+ (BOOL)isIpv6{
    NSArray *searchArray =

    @[ IOS_VPN @"/" IP_ADDR_IPv6,

       IOS_VPN @"/" IP_ADDR_IPv4,

       IOS_WIFI @"/" IP_ADDR_IPv6,

       IOS_WIFI @"/" IP_ADDR_IPv4,

       IOS_CELLULAR @"/" IP_ADDR_IPv6,

       IOS_CELLULAR @"/" IP_ADDR_IPv4 ] ;

    NSDictionary *addresses = [self getIPAddresses];

    NSLog(@"addresses: %@", addresses);

    __block BOOL isIpv6 = NO;

    [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)

     {
         NSLog(@"---%@---%@---",key, addresses[key] );

         if ([key rangeOfString:@"ipv6"].length > 0  && ![[NSString stringWithFormat:@"%@",addresses[key]] hasPrefix:@"(null)"] ) {
             if ( ![addresses[key] hasPrefix:@"fe80"]) {
                 isIpv6 = YES;

             }

         }

     } ];

    return isIpv6;

}

 

//获取所有相关IP信息

+ (NSDictionary *)getIPAddresses

{
    NSMutableDictionary *addresses = [NSMutableDictionary dictionaryWithCapacity:8];

    

    // retrieve the current interfaces - returns 0 on success

    struct ifaddrs *interfaces;

    if(!getifaddrs(&interfaces)) {
        // Loop through linked list of interfaces

        struct ifaddrs *interface;

        for(interface=interfaces; interface; interface=interface->ifa_next) {
            if(!(interface->ifa_flags & IFF_UP) /* || (interface->ifa_flags & IFF_LOOPBACK) */ ) {
                continue; // deeply nested code harder to read

            }

            const struct sockaddr_in *addr = (const struct sockaddr_in*)interface->ifa_addr;

            char addrBuf[ MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN) ];

            if(addr && (addr->sin_family==AF_INET || addr->sin_family==AF_INET6)) {
                NSString *name = [NSString stringWithUTF8String:interface->ifa_name];

                NSString *type;

                if(addr->sin_family == AF_INET) {
                    if(inet_ntop(AF_INET, &addr->sin_addr, addrBuf, INET_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv4;

                    }

                } else {
                    const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6*)interface->ifa_addr;

                    if(inet_ntop(AF_INET6, &addr6->sin6_addr, addrBuf, INET6_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv6;

                    }

                }

                if(type) {
                    NSString *key = [NSString stringWithFormat:@"%@/%@", name, type];

                    addresses[key] = [NSString stringWithUTF8String:addrBuf];

                }

            }

        }

        // Free memory

        freeifaddrs(interfaces);

    }

    return [addresses count] ? addresses : nil;

}

 

//最后，获取ip地址

// 获取手机ip地址

+(NSString*)getIPAddress{
    NSArray *searchArray = [self isIpv6] ?

    @[ /*IOS_VPN @"/" IP_ADDR_IPv6, IOS_VPN @"/" IP_ADDR_IPv4,*/ IOS_WIFI @"/" IP_ADDR_IPv6, IOS_WIFI @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4 ] :

    @[ /*IOS_VPN @"/" IP_ADDR_IPv4, IOS_VPN @"/" IP_ADDR_IPv6,*/ IOS_WIFI @"/" IP_ADDR_IPv4, IOS_WIFI @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6 ];

    NSDictionary *addresses = [self getIPAddresses];

    NSLog(@"addresses: %@", addresses);

    __block NSString *address;

    [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)

     {
         address = addresses[key];

         if(address) *stop = YES;

     } ];

    return address ? address : @"0.0.0.0";

}


@end
